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Interview Questions and Answers for 'Nokia' - 2 question(s) found - Order By Newest

Usually asked to entry level software developers.
  Q1. Write a program to swap two variables without using thirdCore Java
Ans. public static void main(String[] args) {
   int num1 = 1;   
   int num2 = 2;
   num1 = num1^num2;
   num2 = num1^num2;
   num1 = num1^num2;
   System.out.print("num1 = " + num1 +", num2 = "+num2);
}

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  Q2. What is Comparable Interface?Core Java
Ans. It is used to sort collections and arrays of objects using the collections.sort() and java.utils. The objects of the class implementing the Comparable interface can be ordered.

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   Like         Discuss         Correct / Improve     java   collections   comparable interface     Asked in 7 Companies      intermediate        frequent

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